<ul>
    <li ng-repeat="ubtn in ubtnGroup.ubtns track by ubtn.code">
        <button class="ubtn control-block"
                ng-class="{true:'ubtn-blue',false:'ubtn-white'}[ubtn.code == ubtnGroup.selected[0]]"
                ng-click="ubtnGroup.onTabClick(ubtn.code)"
                ng-bind="ubtn.label"></button>
    </li>
</ul>